Definition of sides to middle in US English:

sides to middle

(also side to middle)

adverb

historical
  • With material from the sides interchanged with that in the middle; specifically (with reference to a worn sheet of bed linen) by being cut down the centre and resewn with the two halves interchanged, so that what were the sides become the middle, and the sheet's useful life is extended.

adjective

historical
  • Of a worn sheet of bed linen: cut down the centre and resewn so that the sides and middle are interchanged.

Origin

Mid 19th century; earliest use found in New York Spectator. In some forms from the plural of side + into + middle.

Pronunciation

sides to middle

/ˌsʌɪdz tʊ ˈmɪdl/